This Uthever® NMN from Do Not Age is the gold standard for purity. It is tested independently by third-party laboratories to confirm high purity and low heavy metal content. Nicotinamide mononucleotide (NMN) supports healthy NAD+ levels in humans, resulting in amazing results for Do Not Age NMN users. We recommend this product is taken alongside our Pure Resveratrol, SIRT6Activator® and Pure TMG. To understand the science behind this, please see our Science page. What we are trying to achieve is the resveratrol activating sirtuin. This is so that they can do their healthy work. As for TMG, this acts as a methyl donor, ensures you get the most from your NMN, and supports a healthy liver.